2021 Chevrolet Express 3500 Cooling System Parts

This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator. Read more

17 Coolant / Antifreeze parts are listed for the 2021 Chevrolet Express 3500, from PRESTONE, PEAK, VALVOLINE and 3 other brands. FVP MV5050GAL carries the "Popular" badge.

The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.

In the Economy grade, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

The Premium section lists 4 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 7 options from VALVOLINE, PRESTONE, ACDELCO and 2 other brands — built to original-equipment specification. ACDELCO 105027 is listed in this group.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

GM GENUINE supplies the 3 Coolant Hose / Pipe parts for the 2021 Chevrolet Express 3500.

Listed part numbers: GM GENUINE 25866165, GM GENUINE 84443244 and GM GENUINE 84882346.

This table covers the Coolant Hose Connector flanges. Read more

One part is listed for the 2021 Chevrolet Express 3500 — GM GENUINE 1510595.

This table covers the Coolant Hose retainers and clips. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Express 3500.

This group includes GM GENUINE 11547445 and GM GENUINE 11547271.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

4 Coolant Reservoir parts for the 2021 Chevrolet Express 3500 come from 3 brands — GM GENUINE, DORMAN and GPD.

Part numbers include DORMAN 603078, GM GENUINE 85604316 and GM GENUINE 85666315, among others listed above.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

6 Coolant Reservoir Cap parts for the 2021 Chevrolet Express 3500 come from 5 brands — GM GENUINE, DORMAN, SKP and 2 other brands. The "Popular" part is DORMAN 54218.

This group includes DORMAN 54218, SKP SK54218 and CALORSTAT RC0147 and the remaining parts above.

This table covers the Coolant Reservoir retainers and clips. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Express 3500.

This group includes GM GENUINE 10121502 and GM GENUINE 23382103.

This table covers the Hose clamps. Read more

GM GENUINE supplies the 4 Hose Clamp parts for the 2021 Chevrolet Express 3500.

Part numbers include GM GENUINE 11548759, GM GENUINE 90530642 and GM GENUINE 86308358, among others listed above.

This table covers the seals at the Intercooler. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: GM GENUINE 19130019.

This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap. Read more

8 Radiator parts are listed for the 2021 Chevrolet Express 3500, from GM GENUINE, CSF, GPD and 3 other brands. GM GENUINE 21939 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 2791C.

The Standard Replacement section: 4 options from GM GENUINE, CSF, SPECTRA PREMIUM and 1 other brand. GM GENUINE 21939 is listed in this group.

3 ungrouped parts are not assigned to a grade, with the same engine-level match.

This group includes GM GENUINE 21939, GPD 2791C and CSF 4023 and the remaining parts above.

This table covers the caps that hold system pressure at the radiator or reservoir neck. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

3 Radiator Cap parts are listed for the 2021 Chevrolet Express 3500, from ACDELCO, GATES and MOTORAD.

Listed part numbers: ACDELCO RC85, GATES 31532 and MOTORAD T46.

This table covers the petcocks used to drain the radiator. Read more

This group shows a single part: GM GENUINE 22790134.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

4 Radiator Fan Blade parts for the 2021 Chevrolet Express 3500 come from 2 brands — ACDELCO and GM GENUINE.

Listed part numbers: ACDELCO 1581941, ACDELCO 84723175 and GM GENUINE 86532392, plus the other parts above.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

7 Radiator Fan Clutch parts are listed for the 2021 Chevrolet Express 3500, from FOUR SEASONS, GM GENUINE, HAYDEN and 1 other brand.

This group includes FOUR SEASONS 46144, FOUR SEASONS 46145 and GM GENUINE 1540585 and the remaining parts above.

This table covers the brackets that mount the Radiator Fan Motor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

One part is listed for the 2021 Chevrolet Express 3500 — GM GENUINE 24591472.

This table covers the shrouds that duct air through the fan and radiator. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Express 3500.

Part numbers include GM GENUINE 84362765 and GM GENUINE 84145362.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

4 Radiator Hose parts for the 2021 Chevrolet Express 3500 come from ACDELCO.

Listed part numbers: ACDELCO 84186464, ACDELCO 85144276 and ACDELCO 84882345, plus the other parts above.

This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender. Read more

8 Temperature Sender / Sensor parts are listed for the 2021 Chevrolet Express 3500, from ULTRA-POWER, GPD, HOLSTEIN and 5 other brands. ULTRA-POWER 5S13427 carries the "Popular" badge.

Economy: 3 parts, from ULTRA-POWER, GPD and HOLSTEIN. A representative part number is ULTRA-POWER 5S13427.

The Standard Replacement section: 5 options from STANDARD MOTOR PRODUCTS, FACET, GM GENUINE and 2 other brands. STANDARD MOTOR PRODUCTS TX247 is listed in this group.

Part numbers include ULTRA-POWER 5S13427, GPD 1712496 and HOLSTEIN 2CTS0184, among others listed above.

This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part. Read more

18 Thermostat parts for the 2021 Chevrolet Express 3500 come from 9 brands — MOTORAD, CALORSTAT, AUTOTECNICA and 6 other brands. The "Popular" part is ACDELCO 131160.

The Economy section: 3 options from AUTOTECNICA, DORMAN and SKP. AUTOTECNICA GM0718523 is listed in this group.

Heavy Duty: 2 parts, from MOTORAD. A representative part number is MOTORAD 5523187.

The Performance section lists 2 options from MOTORAD — engineered beyond original-equipment specification. MOTORAD 2523160 is listed in this group.

Standard Replacement: 11 parts, from MOTORAD, CALORSTAT, ACDELCO and 3 other brands. A representative part number is ACDELCO 131160.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

5 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2021 Chevrolet Express 3500, from FEL-PRO, MAHLE / CLEVITE and VICTOR REINZ. FEL-PRO 36106 carries the "Popular" badge.

Listed part numbers: FEL-PRO 36106, FEL-PRO 36219 and MAHLE / CLEVITE C32061, plus the other parts above.

This table covers the housings and outlets the thermostat sits in. Read more

3 Thermostat Housing / Water Outlet parts for the 2021 Chevrolet Express 3500 come from 3 brands — DORMAN, FOUR SEASONS and MOTORAD.

The Economy section: 1 option from DORMAN. DORMAN 9022081 is listed in this group.

Standard Replacement: 2 parts, from FOUR SEASONS and MOTORAD. A representative part number is FOUR SEASONS 85945.

Part numbers include DORMAN 9022081, FOUR SEASONS 85945 and MOTORAD CH5945.

This table covers the gaskets that seal the Water Inlet. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

GM GENUINE supplies both parts for the 2021 Chevrolet Express 3500.

This group includes GM GENUINE 12587397 and GM GENUINE 12650512.

This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off. Read more

8 Water Pump parts for the 2021 Chevrolet Express 3500 come from 5 brands — FVP, GM GENUINE, GMB and 2 other brands. The "Popular" part is GATES 45073.

The Economy section: 1 option from WJB / INMOTION PARTS. WJB / INMOTION PARTS WU1303160 is listed in this group.

Standard Replacement: 4 parts, from GATES, FVP, GM GENUINE and 1 other brand. A representative part number is GATES 45073.

3 further parts sit outside the graded sections, with the same engine-level match.

This group includes GATES 45073, WJB / INMOTION PARTS WU1303160 and FVP 1303160 and the remaining parts above.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

4 Water Pump Gasket parts are listed for the 2021 Chevrolet Express 3500, from FEL-PRO, GM GENUINE and MAHLE / CLEVITE.

Part numbers include FEL-PRO 36110, FEL-PRO 36109 and GM GENUINE 2512073, among others listed above.